Allow pagination for management search results (users, plans, orgs, templates)

[bofstein]

Many of the tables we'll create for admin management can have tens or even hundreds of thousands of results, like a super admin looking at a table of all users. We need to set up the backend to do pagination so we're not pulling all of those at once.

[bofstein]

• Will try to guide people to search and not bring up all users at once, but since a search could bring up over 100k we do want pagination
• Will need some coordination with FE to make sure the right information is passed in query